I have 7 op's 2 RIR's and 3 WL's all with one roo. weeks ( 2 months) ago my op's were loosing feathers on the saddles(back) I thought it they were molting.now my rirs are showing sings on bare saddles. I have now heard that it can't be molting for that starts on the back on the head and works down from there. these girls only have bare backs and most of them are now growing new feathers. all are still lying and everything else. What else could it be?